3x-(2x-7)=-21

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Solution for 3x-(2x-7)=-21 equation:


Simplifying
3x + -1(2x + -7) = -21

Reorder the terms:
3x + -1(-7 + 2x) = -21
3x + (-7 * -1 + 2x * -1) = -21
3x + (7 + -2x) = -21

Reorder the terms:
7 + 3x + -2x = -21

Combine like terms: 3x + -2x = 1x
7 + 1x = -21

Solving
7 + 1x = -21

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-7' to each side of the equation.
7 + -7 + 1x = -21 + -7

Combine like terms: 7 + -7 = 0
0 + 1x = -21 + -7
1x = -21 + -7

Combine like terms: -21 + -7 = -28
1x = -28

Divide each side by '1'.
x = -28

Simplifying
x = -28

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